How Do You Know When A Percolator Is Done Brewing?
You can tell when a percolator is done brewing by the sound it makes. As the water in the bottom chamber heats up, it will start to bubble and then percolate up through the coffee grounds in the top chamber. Once the percolating sound starts to slow down or stop completely, it means that the brewing process is complete. Additionally, most percolators have an indicator light or switch that turns off when the brewing process is finished.